D01B CPC COOPERATIVE PATENT CLASSIFICATION D TEXTILES; PAPER TEXTILES OR FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR D01 NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING (NOTE omitted) D01B MECHANICAL TREATMENT OF NATURAL FIBROUS OR FILAMENTARY MATERIAL TO OBTAIN FIBRES OF FILAMENTS, e.g. FOR SPINNING (crude extraction of asbestos fibres from ores B03B; apparatus for retting D01C) NOTE Attention is drawn to the note following the title of Class D01 WARNING In this subclass non-limiting references (in the sense of paragraph 39 of the Guide to the IPC) may still be displayed in the scheme. 1/00 Mechanical separation of fibres from plant 3/02 . De-burring machines or apparatus (de-burring material, e.g. seeds, leaves, stalks arrangements forming part of or intimately 1/02 . Separating vegetable fibres from seeds, e.g. cotton associated with carding or drafting machines, e.g. 1/04 . Ginning burr-crushing rollers, D01G) 1/06 . Roller gins, e.g. Macarthy type 3/025 . {Removing pieces of metal} 1/08 . Saw gins 3/04 . Machines or apparatus for washing or scouring 1/10 . Separating vegetable fibres from stalks or leaves loose wool fibres 1/12 . Rippling 3/06 . with circular movement of either wool or liquid 1/14 . Breaking or scutching, e.g. of flax; Decorticating 3/08 . with longitudinal movement of either wool or 1/16 . with devices dependent on a bending action liquid to break or loosen fibre-bearing materials 3/10 . Details of machines or apparatus (crushing rollers D01B 1/22) 5/00 Hackling or heckling machines (hand heckling tools 1/18 . with stamping devices D01G 33/00) 1/20 . with scraping devices 5/02 . Details 1/22 . with crushing or breaking rollers or plates 5/04 . Apparatus for feeding, holding, or conveying 1/24 . with toothed or other pointed devices materials to or in machines 1/26 . with beaters rotating about an axis parallel with 5/06 . Construction, mounting, or operating features of the fibre bundle heckling devices 1/28 . with beaters rotating about an axis 5/08 . Arrangements for removing, or disposing of, tow perpendicular to the fibre bundle or waste 1/30 . Details of machines 5/10 . Touch pins or other ending devices 1/32 . Feeding arrangements 5/12 . Framework; Casings; Coverings 1/34 . Devices holding fibres or fibre-bearing 5/14 . Driving arrangements materials during treatment 5/16 . Arrangements for confining or removing dust or 1/36 . Conveying devices, e.g. moving bands or the like ropes 1/38 . Delivery or discharge arrangements 7/00 Obtaining silk fibres or filaments 1/40 . Arrangements for disposing of non-fibrous 7/02 . Cleaning or classifying silk cocoons materials 7/04 . Reeling silk 1/42 . employing liquids 7/06 . Obtaining silk from cocoons or portions thereof not 1/44 . Framework; Casings; Coverings; Grids suitable for reeling (de-gumming silk D01C 3/02) 1/46 . Driving arrangements 9/00 Other mechanical treatment of natural fibrous or 1/48 . Drying retted fibres filamentary material to obtain fibres or filaments 1/50 . Obtaining fibres from other specified vegetable matter, e.g. peat, Spanish moss 3/00 Mechanical removal of impurities from animal fibres (carbonising rags to recover animal fibres D01C 5/00) CPC - 2021.08 1.